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All You Need To know About Sliding Tandems

Sliding tandems on a trailer is a crucial skill for truck drivers to master. It allows them to adjust the weight distribution on the axle groups, ensuring compliance with regulations and maximizing maneuverability. In this comprehensive guide, we will delve into the intricacies of sliding tandems, exploring how much weight is moved, why truck drivers should know this skill, and how to effectively distribute weight on a tractor-trailer.

What Is Sliding Tandems?

Sliding tandems refers to the process of moving the tandem axle group along the length of the trailer. This adjustment helps optimize weight distribution, ensuring that the axles bear the appropriate load. However, it’s important to note that regulations on sliding tandems may vary by state and province. These regulations often dictate the maximum distance between the kingpin on the trailer and the axle group, commonly referred to as the trailer wheelbase or kingpin to rear axle/tandems distance.

semi tractor trailer truck tandem axle for sliding
sliding a tandem axle housing under a 6 wheel medium duty truck

Importance of Sliding Tandems

The primary reason for sliding tandems is to maintain a manageable wheelbase for the truck-trailer combination. A shorter wheelbase enhances maneuverability, reducing the risk of running over curbs and improving overall control. Additionally, sliding tandems allows truck drivers to adjust weight distribution according to the load’s characteristics. By shifting the tandems, they can ensure that the weight is appropriately distributed between the trailer and the truck.

Weight Distribution and Sliding Tandems

To comprehend the impact of sliding tandems on weight distribution, it’s essential to understand how much weight is moved when adjusting the axle group. As a general rule of thumb, each hole on the trailer corresponds to approximately 250-300 pounds being moved from the truck to the trailer, or vice versa. By sliding the tandems, truck drivers can fine-tune the weight distribution and achieve optimal balance.

sliding tandem in a white big semi trailer
overweight trailer axle closeup

Procedure for Sliding Tandems

The procedure for sliding tandems may differ depending on the specific situation. Let’s explore a couple of scenarios:

Scenario 1: Overweight on Trailer Axles

If there is too much weight on the trailer axles, the tandems should be moved backward. By shifting the axle group toward the rear of the trailer, weight is transferred from the trailer to the truck. This adjustment helps ensure that the trailer axles remain within the legal weight limits.

Scenario 2: Overweight on Drive Axles

Conversely, if the truck’s drive axles are overweight, the tandems should be moved forward. Shifting the axle group toward the front of the trailer redistributes weight from the truck to the trailer, alleviating the strain on the drive axles.

Legal Considerations

It’s vital to note that there are specific regulations governing how far back tandems can be placed. These regulations vary by jurisdiction. Therefore, it is crucial for truck drivers to familiarize themselves with the laws of the states or provinces they will be traveling through. Compliance with these regulations ensures both safety and adherence to the legal requirements.

overweight trailer axle closeup
truck driver expert in sliding tandems

Benefits of Sliding Tandems

Truck drivers should prioritize learning and mastering the skill of sliding tandems for several reasons. Firstly, it enables them to maintain compliance with weight regulations, preventing potential fines and penalties. Secondly, proper weight distribution through sliding tandems enhances overall stability and control during driving, reducing the risk of accidents. Lastly, by optimizing weight distribution, truck drivers can maximize fuel efficiency, leading to cost savings in the long run.

Factors Affecting Weight Distribution

Several factors influence the weight distribution on a tractor-trailer. It’s important for truck drivers to consider these factors when making adjustments to the tandems. Some of the key factors include:

overweight trailer axle closeup

Benefits of Sliding Tandems

Scenario 1: Overweight on Trailer Axles

If there is too much weight on the trailer axles, the tandems should be moved backward. By shifting the axle group toward the rear of the trailer, weight is transferred from the trailer to the truck. This adjustment helps ensure that the trailer axles remain within the legal weight limits.

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sliding tandems closeup

Best Practices for Sliding Tandems

To effectively slide tandems and achieve optimal weight distribution, truck drivers should follow some best practices. These practices include:

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To take the first step towards safeguarding your dreams, simply click the Request a Quote button to fill out our quick and easy quote form. Alternatively, you can reach out to our dedicated expert, Ash, at ash@dreamassurancegroup.com via email. Don’t let uncertainty hold you back; embrace the assurance of tomorrow, today.

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